CLIF Bloks Energy Chews
Our take: CLIF Bloks are the default because they are easy to buy, easy to portion, and familiar to many runners. The downside is texture: not everyone wants to chew while running hard.
- Chew format
- Approx. 33 g carbs per 3-piece serving
- Caffeinated and non-caffeinated flavors
- Sleeve packaging
Why it stands out
- Easy carb math
- Widely available
- Many flavors
Know before buying
- Can be firm
- Chewing takes effort
- Packaging can be fiddly while racing
Runners who want simple carb math, broad flavor availability, and an easy-to-find chew.
You dislike firm chews or find chewing hard at race effort.
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Show the research Scores, sources, upside, and cautions
Expert, Reddit, YouTube
Based on page updates and the dates available on public sources.
Open the cited sources below to inspect the evidence.
Runner discussion often treats Bloks as a reliable chew baseline.
YouTube testing
The recurring caution is chewing and breathing at faster efforts.